Aluminium 1100 is soft, low strength and is considered the most commercially pure aluminium alloy, composed of 99.6% aluminium. Copper, iron, magnesium, manganese, silicon, titanium, vanadium and zinc comprise the remaining 0.4%. It cannot be hardened by heat treatment, but is very weldable and formable. Cold working is the most common way to form aluminium 1100. Therefore, it may be shaped into many different products, including chemical equipment, railroad tank cars, fin stock, dials, name plates, cooking utensils, rivets, reflectors and sheet metal. The plumbing and lighting industries also use aluminium 1100.

It is manufactured a wide variety of different ways, but may only be hardened by cold working. aluminium 1100 is the softest form of aluminium and therefore is not used for high-strength or high-pressure applications. Pure aluminium is able to be hot worked or cold worked, and is forged anywhere from 700 to 950 degrees F. Aside from forging, it is shaped by spinning, stamping and drawing.

These process produce aluminium shapes in the form of foil, plates, round bars or rods, metal sheets, strips and wire. Resistance welding is possible, but may take many tries to obtain good results. It has 55% the electrical conductivity of copper.

Principal Design Features
This is a relatively low strength, essentially pure aluminium, alloy. It is noted for excellent welding characteristics and formability along with good corrosion resistance. It cannot be hardened by heat treatment.

 

Applications
Commonly used in the manufacture of chemical equipment and railroad tank cars.

Machinability
The machinability of AL 1060 is fair to poor, especially in the soft temper conditions. In the harder (cold worked) tempers such as H16 and H18 the machining characteristics are improved. Either carbide or high-speed steel tooling may be used and use of lubricants is recommended, although some cutting may be done dry.

Forming
This alloy has excellent forming capability by cold or hot working with commercial techniques.

Welding
AL 1060 may be welded by standard commercial methods. If filler rod is required it should be of AL 1060. A precaution should be noted for the use of resistance welding as by this method some trial and error experimentation may be required to obtain good results.

Heat Treatment
This alloy does not harden by heat treatment. It may be annealed after cold working. See "Annealing".

Forging
This alloy may be forged in the temperature range of 950 to 700 F.

Hot Working
Hot working, if required, may be done in the range of 900 to 500 F.

Cold Working
The cold working characteristics of AL 1060 are excellent. It can readily be cold worked by all conventional methods.

Annealing
Annealing may be done at 650 F followed by air cooling.

Hardening
The alloy hardens only from cold working. Tempers H12, H14, H16, H18 are determined by the amount of cold working imparted into the alloy.

Other Physical Props
Electrical conductivity 55% of copper.

Other Mechanical Props
Shear strength of annealed (O temper) is 7 ksi. For H14 temper it is 9 ksi and for H18 temper 11 ksi.

Chemical Composition

aluminium99.6 min
Copper0.05 max
Iron0.35 max
Magnesium0.03 max
Manganese0.03 max
Remainder Each0.03 max
Silicon0.25 max
Titanium0.03 max
Vanadium0.05 max
Zinc0.05 max

 

Mechanical Properties
PropertiesConditions
T (°C)Treatment
Density (x1000 kg/m22.7125
Poisson's Ratio0.3325
Elastic Modulus (GPa)70-8025
Tensile Strength (Mpa)11025H12
Yield Strength (Mpa)105
Elongation (%)12
Reduction in Area (%)
Hardness (HB500)2825H12
Shear Strength (MPa)6925H12
Fatigue Strength4125H12

 

Thermal Properties
PropertiesConditions
T (°C)Treatment
Thermal Expansion (10 -5/C°)23.620-100
Thermal Conductivity (W/m-K)21825H18

 

Electric Properties
PropertiesConditions
T (°C)Treatment
Electric Resistivity (10 -9 O-m)3025H18

 

AA 1100
ConditionsTensile Properties
T (°C)Treatment
25H12Tensile Strength (MPA)110
Yield Strength (MPa)105
Elongation (%)12
Reduction in Area (%)
25H14Tensile Strength (MPA)125
Yield Strength (MPa)115
Elongation (%)9
Reduction in Area (%)
25H16Tensile Strength (MPA)145
Yield Strength (MPa)140
Elongation (%)6
Reduction in Area (%)
25H18Tensile Strength (MPA)165
Yield Strength (MPa)150
Elongation (%)5
Reduction in Area (%)
250Tensile Strength (MPA)90
Yield Strength (MPa)34
Elongation (%)35
Reduction in Area (%)

Physical Data : [top]

Density (lb / cu. in.)0.0975
Specific Gravity (kg/m³)2.705
Melting Point (Deg F)1200
Modulus of Elasticity Tension10
Modulus of Elasticity Torsion3.85

 

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